不同直径GFRP筋的拉伸性能尺寸效应试验研究  

EXPERIMENTAL STUDY ON THE SIZE EFFECT OF TENSILE PERFORMANCE OF GFRP BARS WITH DIFFERENT DIAMETERS

作　　者：武军[1] 陈文学[1] 焦裕钊 

机构地区：[1]河南理工大学土木工程学院,河南焦作454000 [2]山东斯福特实业有限公司,山东泰安271000

出　　处：《玻璃钢／复合材料》2015年第4期35-40,共6页Fiber Reinforced Plastics/Composites

基　　金：河南省科技厅国际合作项目(144300510041)

摘　　要：利用电液伺服万能试验机对5种不同直径的GFRP筋进行了拉伸性能试验,研究了尺寸效应对GFRP筋拉伸性能指标的影响规律。试验结果表明,尺寸效应对极限强度和极限拉应变的影响比较明显,随直径的增大而减小,而对弹性模量的影响不明显;试样的拉伸破坏模式为劈裂破坏;应力-应变曲线呈现出线性关系;弹性模量的平均值为48.06GPa;相同直径下不同长径比试样对极限强度的影响需要进一步深入研究。In order to study the law of size effect on the tensile performance indexes of GFRP bars,the tensile performance experiments of GFRP bars with 5 kinds of different diameters were conducted by the electro-hydraulic servo universal testing machine. The experimental results show that the influence of size effect on ultimate strength and ultimate tensile strain are significant. With the diameter increases,the ultimate strength and ultimate tensile strain increase as well,while the influence on elastic modulus is not obvious. The failure mode of specimens belongs to splitting failure and the stress-strain curves show a linear relationship; The average value of elastic modulus is48. 06 GPa. The influence of different slenderness ratio on the ultimate strength of specimens with the same diameter should conduct a further study.

关 键 词：GFRP筋 拉伸性能 尺寸效应 应力-应变曲线 弹性模量 

分 类 号：TB332[一般工业技术—材料科学与工程] TU502[建筑科学—建筑技术科学]